Meanwhile, sometime between Tuesday night and this morning, ABC News received a fax from someone claiming to be Bryce Williams. It is a lengthy document: 23 pages. ABC News has turned it over to authorities.

Alison Parker, 24, and Adam Ward, 27, were killed in the field during a live news segment in Moneta, Virginia, according to their station, WDBJ-TV, a CBS affiliate serving the Roanoke-Lynchburg television market.

WDBJ| Virginia State Police

Virginia State Police released this video grab showing the male suspect in a fatal shooting early on Aug. 26, 2015.

A third person, Vicki Gardner, whom Parker was interviewing when she was injured in the shooting, is out of surgery and in stable condition, Carilion Roanoke Memorial Hospital said.

WDBJ president and general manager Jeffrey A. Marks confirmed that Williams used to work at the station but was dismissed two years ago. Marks described him as "an unhappy man" who was dismissed after he "quickly became known for a reputation for being difficult to work with."

Marks said Williams was "looking out for people to say things that he would take offense too."

The shooting was reported at 6:45 a.m.

Franklin County school officials said three schools were on lockdown in the area of the shooting and that police officers were offering additional security.

The shooting itself took place at Bridgewater Plaza, a recreational facility with shops, restaurants, a mini golf course and boat rentals, where Parker and Ward were reporting on the 50th anniversary of Smith Mountain Lake.

Marks, the station president, went on the air this morning confirming the two deaths and noting that both victims were in relationships with other staffers at the station. Chris Hurst, who was dating Parker, posted tributes on his Twitter feed:

Marks said it was his "very very sad duty" to report their deaths, and noted that the shooting is under investigation. "We have other members of the team with us today holding back tears, frankly," Marks said.

He said Parker was a graduate of James Madison University in Harrisonburg, Virginia, while Ward was a graduate of Virginia Tech in Blacksburg, Virginia.

Marks and the anchors confirmed on air that Ward's fiancee was a morning producer at the station who was celebrating her last day at work today before starting a new job. Parker reportedly brought in balloons as part of the celebration before going out for the fatal live report.

Jay Webb, the news director at ABC affiliate station WHSV-TV in Harrisonburg (about two hours away) who had previously worked at WDBJ for several years, said he knew both victims. "Unthinkable," he told ABC News this morning, adding that he was especially close to Ward. "It’s a very hard time in our newsroom here this morning, as it is, I’m sure, across newsrooms across the country this morning."

WDBJ

WDBJ in Virginia shared these image of reporter Alison Parker and Adam Ward after reporting that they had been killed in a shooting on Aug. 26, 2015.

He said he also knew Parker because she recently interned at his station before getting the job at WDBJ, which is owned by Schurz Communications of South Bend, Indiana.

"Alison was vibrant," he said. "Both extremely good people, will be missed."

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